Film Wrapper Welding for Stack Packaging Stability
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Solution Overview
Problem
Existing packaging methods for stacks of objects often result in insufficient wrapping, leading to slippage or dropping during transport and storage due to inadequate film adherence and mechanical stress resistance.
Innovation Solution
A packaging apparatus and method that uses a film wrapper to cover vertical side faces and a horizontal top face, with a fold-over device and double welding bars to secure the film in place, ensuring complete coverage and mechanical stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the stack is transported over a relatively great distance prior to being introduced into a shrinking device and has to pass a number of subassemblies, then the wrapping process can be completed, but the wrapper slips or drops down on the stack before the film is shrunk, resulting in insufficient wrapping
Solution Approach 1:
The patent applies preliminary action by welding the wrapper ends to the stack side faces before the stacking process is completed. The first welder welds the wrapper ends to the side faces of the stack, securing the wrapper in place before the stack is transported to the shrinking device. This prevents the wrapper from slipping or dropping down during transport, resolving the contradiction between completing the wrapping process and maintaining wrapper adherence.
2Reliability
If the wrapper ends are welded together at a side face before stacking, then the wrapping can be secured, but the wrapper cannot properly cover all side faces and the stacking process is compromised
Solution Approach 1:
The patent applies preliminary action by welding the wrapper ends to the side faces of the stack before the stacking process is completed. The first welder welds the wrapper ends to the side faces of the stack, securing the wrapper in place before the stack is transported to the shrinking device. This prevents the wrapper from slipping or dropping down during transport, resolving the contradiction between completing the wrapping process and maintaining wrapper adherence.
3Device complexity
If the film wrapper is used to cover side faces without fold-over, then the wrapping process is simpler, but the wrapper cannot resist mechanical stresses during transport and storage
Solution Approach 1:
The patent applies preliminary action by welding the wrapper ends to the side faces of the stack before the stacking process is completed. The first welder welds the wrapper ends to the side faces of the stack, securing the wrapper in place before the stack is transported to the shrinking device. This prevents the wrapper from slipping or dropping down during transport, resolving the contradiction between completing the wrapping process and maintaining wrapper adherence.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a secure, water-tight, and mechanically robust packaging that prevents slippage and damage during transport, maintaining product integrity and ensuring effective wrapping with reduced effort and cost.
Implementation Method 1
A first welder welds ends the film wrapper together at one of the side faces of the stack
Implementation Method 2
A second welder welds the folded-over film sections together on the top face of the stack
Implementation Method 3
This is an elastic film or a plastic film that may come to rest against the stack under the effect of elastic reset forces
Data Source
AI summary
An apparatus for wrapping a stack of objects vertical side faces and a horizontal top face has a unit for wrapping a film wrapper around the stack such that respective sections of the wrapper extend upward from each of the side faces. A first welder welds ends the film wrapper together at one of the side faces of the stack. A fold-over device folding the film sections over onto the top face of the stack. A second welder welds the folded-over film sections together on the top face of the stack.